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Year XXXI, Issue 2, 2022<<Archive>>

Еxpеrimеnts

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DETERMINING THE DEPENDENCE OF THE SPEED OF SOUND IN AIR ON THE TEMPERATURE BASED ON PROPERTIES OF STANDING WAVES

Standing waves are a naturally arising phenomenon in many situations where sound waves propagate in an enclosed medium. Inspired by problem 17 from the International Young Naturalists Tournament (2021), this investigation aims to establish a relationship betwe...

standing waves; speed of sound; temperature; molar mass; experimental investigation; IYNT

Nеw Approаchеs

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COMETS – PART 1

The appearance of a bright comet is one of the most beautiful astronomical phenomena, attracting the attention of professionals and amateur astronomers, as well as the media around the world. Bright comets are relatively rare events – occurring only several ti...

: comets; astronomy; chronology; observations; astronomical events; history of astronomy

Sciеncе аnd Sociеty

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ANALOGIES BETWEEN CHEMICAL REACTIONS AND QUALITY OF WORKPLACE ENVIRONMENT

Analogies are useful to deepen understanding of the object of study. Chemical reactions have an interesting behaviour, for a better comprehension they could be related with the real live situations. Thinking about the work organization problems is an important...

continuing education; public understanding; analogies/transfer; reactions

Еducаtion: Thеory аnd Prаcticе

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INVESTIGATION OF THE BEHAVIOR OF CONICAL PILES OF GRANULES AND POWDER

When a granular material is poured on top of a surface, the formation of a cone-like pile is observed. This paper concerns with the factors that affect the size of the angle, that the pile makes with the ground, also known as angle of repose. The field of Phys...

angle of repose; granular material; conical pile; avalanche; cohesion; adhesion; moisture

From thе Rеsеаrch Lаborаtoriеs

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EXPERIMENTAL DETERMINATION OF THE SPECIFIC HEAT CAPACITY OF AQUEOUS LICL SOLUTIONS AS A FUNCTION OF TEMPERATURE AND CONCENTRATION

This project is focused on the experimental determination of the specific heat capacity of aqueous solutions of LiCl with different mass concentrations as a function of temperature. A new laboratory method for its measurement has been proposed, which is appli...

specific heat capacity; heat conduction experiment; lithium chloride; temperature dependence; concentration dependence
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